Current detecting circuit based on bi-directional saturation current sensor and driving method thereof
A technology of current detection circuit and current sensor, which is applied in the direction of measuring current/voltage, only measuring current, instruments, etc., can solve the problem that the detection current temperature has a large influence and it is difficult to meet the reliable high-temperature working ability and high-precision isolation of SiC-based high-temperature resistant converters. And AC/DC detection ability, Hall element is difficult to withstand high temperature environment above 200 ℃, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment
[0038] The operating principle of the circuit of the present invention is: the primary side current i p and primary magnetic field strength H p The relationship is: H p =(i p ·N p ) / l m ; H-bridge power device T 1 , T 4 Secondary current i at turn-on s1 , T 2 , T 3 Secondary current i at turn-on s2 The relationship with the magnetic field strength of the secondary side is: ΔH s1 =(i s1 ·N s ) / l m , ΔH s2 =(i s2 ·N s ) / l m . It can be seen from the hysteresis loop of the secondary side of the current sensor: H p =(ΔH 1 +ΔH 2 ) / 2. Therefore, the source current to be measured can be represented by two secondary currents: i p =N s (i s1 + i s2 ) / 2N p .
[0039] From the hysteresis loop of the secondary side of the current sensor, it can be seen that the remanence of the positive half axis and the negative half axis are H c and -H c . When the temperature rises, the size of the positive and negative remanence will drift with temperature, but the magnit...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com